Rosas-Caro, J.C.; Ramirez, J.M.; Peng, F.Z.; Valderrabano, A.: 'A DC–DC multilevel boost converter', IET Power Electronics, 2010, 3, (1), p. 129-137, DOI: 10.1049/iet-pel.2008.0253 IET Digital Library, https://digital-library.theiet.org/;jsessionid=1qig2jdsc8gj4.x-iet-live-01content/journals/10.1049/iet-pel.2008.0253